<template>
<div>
  <!--  面包屑导航区域-->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>权限管理</el-breadcrumb-item>
    <el-breadcrumb-item>角色列表</el-breadcrumb-item>

  </el-breadcrumb>
<!--  卡片视图-->
  <el-card>
<!--    添加角色按钮区-->
    <el-row>
      <el-col>
        <el-button type="danger" @click="addUserVisible = true"

        >添加角色</el-button>
      </el-col>
    </el-row>
<!--角色列表区-->
    <el-table :data="rolesList"  boder stripe>
<!--      展开列-->
      <el-table-column  type="expand">
          <template slot-scope="scope">
<!--            <pre>{{ scope.row}}</pre>-->
            <el-row :class="['bdbottom', i1 ===0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id"  >
<!--              第一列里渲染一级权限占5列. 总共24列,-->
              <el-col :span="5">
                 <el-tag closable  @close="removeRightById(scope.row, item1.id)" >{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
<!--              第二列里渲染二\三级权限  占19列-->
              <el-col :span="19">
<!--                通过for循环,嵌套渲染二级权限-->
                <el-row :class="[ i2 === 0 ? '' : 'bdtop' , 'vcenter' ]" v-for="(item2 , i2)  in item1.children"  :key="item2.id"  >
                      <el-col :span="6">
                      <el-tag type="success" closable  @close="removeRightById(scope.row, item2.id)"> {{item2.authName}} </el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="13">
                        <el-tag type="warning" v-for="(item3, i3 ) in item2.children" :key="item3.id"  closable  @close="removeRightById(scope.row, item3.id)"> {{item3.authName}}

                        </el-tag>
                      </el-col>
                </el-row>



              </el-col>
            </el-row>



          </template>


      </el-table-column>
<!--      索引列-->
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>    <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" >
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit">编辑</el-button> <el-button type="danger" icon="el-icon-delete">删除</el-button>
          <el-button type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>


        </template>
      </el-table-column>
    </el-table>
  </el-card>
<!--  添加角色的对话框-->
    <el-dialog
      title="添加角色"
      :visible.sync="addUserVisible"
      width="50%"
      @close="addDislogClosed"
    >
<!-- 添加角色的主体区域-->
      <el-form :model="addNewUser" :rules="addNewUserRules" ref="addRolesRef" label-width="100px" >
        <!--      prop是验证规则的属性-->
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addNewUser.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addNewUser.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!--底部按钮区域-->
      <span slot="footer" class="dialog-footer">
    <el-button @click="addUserVisible = false">取 消</el-button>
    <el-button type="primary" @click="addNewRoles"  >确 定</el-button>
  </span>
    </el-dialog>
<!--添加权限分配的框-->
  <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="30%"
      @close="setRightDialogClosed"
      >
    <el-tree :data="rightsList" :props="treeProps"   show-checkbox   node-key="id"  default-expand-all  :default-checked-keys="defKeys" ref="treeRef"	></el-tree>
    <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
  </el-dialog>
</div>
</template>

<script>
export default {
  data(){
    return {
    //所有角色列表数据
      rolesList:[],
      //新增的角色数据
      addNewUser:{
        roleName:'',
        roleDesc:''
      },
      //新增角色的规则要求
      addNewUserRules:{
        roleName:[
          {required: true,message:'请输入角色名称', trigger: 'blur'},
        ],
        roleDesc:[
          {required: true,message:'请输入角色描述', trigger: 'blur'},
        ]
      },
      //添加框是否显示
      addUserVisible:false,
      //分配权限框是否显示
      setRightDialogVisible:false,
      //所有权限的数据
      rightsList:'',
      //树形控件 的属性绑定对象
      treeProps:{
        label: 'authName',
        children:'children'
      },
      //默认选中的节点id值
      defKeys:[],
      //当前即将分配权限的id
      roleId:'',


    }
  },
  created() {
    this.getUserList()
  },
  methods:{
    //获取所有角色的列表
   async getUserList(){
     const {data:res} = await this.$http.get('roles')
      if(res.meta.status !==200 ) {
        return this.$message.error('获取所有角色的列表失败')
      }
      this.rolesList = res.data
     console.log(this.rolesList);
     this.$message.success('获取所有角色列表成功')
    },
    //添加角色
    addNewRoles(){
     //!valid 就代表 false，形参起始时为true
     this.$refs.addRolesRef.validate(async valid => {
       if (!valid) return
       const { data: res } = await  this.$http.post('roles',this.addNewUser)
       if(res.meta.status !== 201 ){
         return this.$message.error('添加角色失败!')
       }
       this.$message.success('添加角色成功!')
       this.getUserList()
       this.addUserVisible = false
     })
    },
    addDislogClosed(){
     this.$refs.addRolesRef.resetFields()
    },
    //根据ID删除对应的权限
      async removeRightById(role,rightId){
     //MessageBox,弹框提示用户是否要删除
         const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch( (err)  => {
        return err
      })
        if(confirmResult !== 'confirm') {
          return this.$message.info('用户取消了删除')
        }
        console.log('确认了删除');
        //调用请求的接口. 点击时回调用@close的removeRightById事件,可以把对应的角色数据传过去
          const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        console.log(res);
        if(res.meta.status !==200) {
            return this.$message.error('删除权限失败')
          }
            // this.getUserList()
          role.children = res.data
      },
    //展示分配权限的对话框
     async showSetRightDialog(role){
        this.roleId = role.id
     //先获取所有的权限
           const {data:res} =  await this.$http.get(`rights/tree`)
       if(res.meta.status !== 200){
         return this.$message.error('获取用户权限失败')
       }
       //把获取到的权限保存到data中
       this.rightsList = res.data
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
    },
    //点击分配权限,通过递归的形式立即把当前角色身上已有的三级权限拿出来,把所有的id添加到defkeys数组中,再展开树
    //(node 节点来进行判断是否是三级节点， arr 数组来保存)
    getLeafKeys(node , arr){
      //如果当前node节点不包含children 属性，则是3级节点
      if(!node.children)  {
        return arr.push(node.id)
      }

      //如果不是3级节点,每循环一项，拿到一个子节点item，再根据这个item，再次调用递归函数this.getLeafKeys
      node.children.forEach( item => {
          this.getLeafKeys(item, arr)
      })
    },
    //监听分配权限对话框的的关闭事件
    setRightDialogClosed(){
     this.defKeys = []
    },
    //点击为角色分配权限: 1 先拿到所有的key ,用展开运算符。。。，可以把两个数组合并成一个数组  2拼字符串发请求 3、刷新列表隐藏对话框
      async allotRights(){
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys(),
        ]
      console.log(keys);
        //形成一个以逗号 拼接的字符串
      const  idStr = keys.join(',')
          const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})
        if(res.meta.status !== 200) {
          return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功拉！！！')
        this.getUserList()
        this.setRightDialogVisible = false
    },
  }


}
</script>

<style scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}

</style>
